Anti heroes / Antiheroji

Yesterday, in the bus, Ada and I sat down next to an old man. He was talking in the phone like it was his living room. Loud and clear. Everyone could hear him. Unfortunately! Every second word he was mentioning the male organ and using f-k. I felt very uncomfortable when my daughter could here his bad language. I wondered in that moment should I tell a old man to watch his language? I feel it is somehow embarrassing to teach a 60+ year old man how to talk properly. What do you guys think?